insight vs perceptiveness

insight and perceptiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
insight	Yes	No	No	No
perceptiveness	Yes	No	No	No

As nouns, insight and perceptiveness are synonyms defined as:

Other synonyms of insight include perceptivity.

insight (noun)	perceptiveness (noun)
grasping the inner nature of things intuitively	the quality of insight and sympathetic understanding
the clear (and often sudden) understanding of a complex situation	delicate discrimination (especially of esthetic values)
clear or deep perception of a situation	perception of that which is obscure
a feeling of understanding	a feeling of understanding